| Father | Cornelis Leenderts In't Velt (1560 - 1640) |
| Mother | Ariaentje Leenderts Verschoor (1560 - ) |
| Sibling | Leendert Cornelis In't Velt (1590 - 1673) |
| Sibling | Harman Cornelisz in 't Veld (1587 - ) |
| Sibling | Jan Cornelisz. in 't Velt (1582 - ) |
| Sibling | Jochem Cornelis In't Velt (1595 - 1655) |
| Sibling | Lijsbet Cornelis in 't Velt (1592 - 1671) |
| Sibling | Pieter Cornelisz. in 't Velt (1570 - ) |
| Sibling | Annetje Cornelis in 't Velt (1598 - ) |
| Sibling | Abraham Cornelisse In't Velt (1585 - 1661) |
| Sibling | Adriaen Cornelisse in 't Velt (1582 - ) |